I know that you get charged $39.99 disconnect fee within the first 12 months. What happens if you cancel after the first 12 months, and, I bought my adapter at Radio Shak, do I need to return it if cancelling?

My year is up in July and time warner finally has digital phone service in my area. Of the disconnect fee is the same after the first 12 months as it is before, then I'll switch now. If not. I'll wait till the 12 months is officially up.